"A supernatural power or spell that according to voodoo belief can enter into and reanimate a corpse"

but rage-virus just dont' kill the host they just infect the host, kinda like a cold but that make you into a raging killing machine that can use tools

rage-virus was also based on zombiefication but they wanted a more dangerous and action filled one for their movie's, also by that they not dead they also give people a hope for a cure . more or less you can call it zombificaiton 2.0

I can't blame you if you only watched "the walking dead" as that serie is one that is full of plot holes that it brings shame to post apocolyptic gener, than I can understand the easy confusion